1. 2NaOH+H2S=Na2S+2H2O
n(NaOH)=n/M=20/40=0.5моль
n(NaOH)=0,5n(H2S)=0.25моль
V(H2S)=n*Vm=0.25*22.4=5.6л
2.
Zn+S=ZnS
ZnS+2H2O=Zn(OH)2+H2S
2H2S+O2=2S+2H2O
2H(+)+O2=2H2O
H2S+2NaOH=Na2S+2H2O
H2(+)+2OH(-)=2H2O
2Na2S+2CuCl2=4NaCl+2CuS
2S(-2)+2Cu(+2)=2CuS
1. 2NaOH+H2S=Na2S+2H2O
n(NaOH)=n/M=20/40=0.5моль
n(NaOH)=0,5n(H2S)=0.25моль
V(H2S)=n*Vm=0.25*22.4=5.6л
2.
Zn+S=ZnS
ZnS+2H2O=Zn(OH)2+H2S
2H2S+O2=2S+2H2O
2H(+)+O2=2H2O
H2S+2NaOH=Na2S+2H2O
H2(+)+2OH(-)=2H2O
2Na2S+2CuCl2=4NaCl+2CuS
2S(-2)+2Cu(+2)=2CuS